Repeating device for talking machines



Spt. 12, 1933. o G CLARK 1,926,580

REPEATING DEVICE FOR TALKING MACHINES Filed May 31, 1929 4 Sheets-Sheet'l Sept. 12,1933. G. F. CLARK REPEATING DEVICE FOR TALKING MACHINES imvenfor Otinr negs Se t. 12, 1933. G. F. CLARK REPEATING DEVICE" FOR TALKING MACHINES Filed May 31, 1929 4 Sheets-Sheet 3' Snventor Ottorzzegs.

Se t. 12, 1933. G. F. CLARK REPEATING DEVICE FOR TALKING, MACHINES Filed May 31, 1929 4 Sheets-Shee t 4 Patented Sept. .1933 t REPEATING DEVICE FOR TALKING MACHINES George Frederick Clark, West Drayton, England,

assignol', by mesne assignments, to Radio Corporation of America, New York, N. Y., a corporation of Delaware I Application May 31, 1929, Serial No. 367,375, and

iin'Great Britain June 12,- 1928 12' Claims. (01. 274-) This invention relates to improvements in refixed upon the motor boardof a talking machine peating devices for talking machines whereby and beneath the turntable 2 (Fig. 1). .For the when a record has been played the sound box sake of convenience in illustration the supporting may be lifted to disengagethe stylus from the plate is cutaway. The, stopping mechanism record, swung outwards and lowered to engage the preferably comprises a brake pad carrying memstylus with the edge of the record, to replay it. ber 3, mounted for rotation about a pin slip- .The invention is adapted for use in conjuncported by the plate, a hand lever 4 pivotally I tion with a known form of automatic stopping mountedonthe member 3 and having a. tension means, the mechanism normally used for operatspring 5 connected between a lug 6 on the hand ing the 'brake or stopping switch being utilized, lever 4 and a lug 7 on the base plate, a pivoted when a record is to be repeated;to set the repetit t lever 3 urged by a spring 9 eohneeted tion mechanism into operation to raise, return w n s d nt 8 d t e 11 7 o the ba e and lower the sound box.. Means are provided plat int a p sit n wh r it n s th h whereby the stopping means are prevented from v 4 t d the brake inemheli in h operating when repetition is desired, and man-. posit on, a toothed segment operatively nually operated means are also provided to permit nec d With e detent member a p 11 themechanism to be reset from the condition Ti d y a ve 12 mev b wit the S u arm where repetition is effected when the end of a 3 said paw n a in w th th t th d se m nt record is reached to the condition where the 10 When e 12 is rocked y h needle b i machine i automatically stbpped wh th a d given a reverse movement at the end of a record of a record is reached, and vice versa. Means are (es y riding in an eccentric groove-0n the also provided whereby records of diiierent sizes 0rd) to rock the detent 3 and Permit e brake maybe repeated, the sound box being moved member 3 to move into the p si i and varying distances outwards according to the size a link 14 Divotelly Connected With member 3 Lei r rd th t t b1 and having a hook 15 which engages with the end The invention consists in a repetition device of level" to move-the member 3 h 11 use i r tedl playing r ng machine position as the sound box 16 is moved outwards record comprising a lever having an inclined sury hand towards the edge of the record. I

0 face and movable in a horizontal plane about In applying this form of brake to the apparatus an axis to raise the reproducer during movement orming the subject O t Present pp of the lever in one direction about theaxis and t e o t ed s m 10 is not dl connected to lower the reproducer during movement of the W the detent 8 but is meunted p a level lever in t other direction, I which is movable about the same axis as the de-' 5 The utward movement of the sound reprotent and means are provided to couple the-detent ducer to the point of commencement of the rec- 8 a d t e e 7 et h h automatic 9Q ord is effected by a lever pivoted to move in a brake is required to pe this P p I horizontal plane, the point of pivotation'of said the end 18 of lever 1'1 which lies beneath detent lever being adjustable to permit'the throw of 8 (shownbroken away in F e 3) is 'PI'OVidBdIWith the operative end of said lever and distance Ope ended slot and p the under surface moved by the sound arm to be varied; of the detent 8 is rigidly mounted a slotted plate The invention is illustrated by way of example 19 and when it is desired that lever 17 and detent I in the accompanying drawings in which 8 shall move together, a pin- 20 is inserted in the i Figs. 1 and 2 are views in planshowing the two slots. To permit the pin 2ll'to be inserted in [5 parts in different positions for the repetition of nd withdrawn from the slots a change over lever different size records. I v 21 is pivotally mounted on the base plate at 22 Fig. 3 is a plan view with the parts in the posibeing connected with a hand lever 23 operable in tion for automatic stopping of the machine when a ma ner Com ly e p in eormeetien W the end of a record is reached, parts of the repetithe stopping means of talking machines. The tion mechanism being omi ted ior the sake of change over lever 21 carries at one end a pivot- )0 clearness. ally mounted member 24 and on the free end of Fig. 4 is a detail and I this member is carried the pin 20. 1 Fig. 5 is a view in elevation. To facilitate entry-of the pin 20 into the slots The parts of themechanism are carried on the in members 18. and 19 the open: ends are flared 55 underside of a plate having a downwardly exoutwards and the pin 20 also projects through the tending flange 1 to permit the apparatus to be pivoted member-24 into an arcuate slot 25 formed in the lever 21 so that while it is capable of movement with detent 8 and lever 17 it is always retained in such a position that it can enter the slots.

When the'pin 20 is in the slots (Fig. 3) movement of the toothed segment 10 will be transmitted to the detent 8 and the stopping devices 3 operated. When the pin 20 is out'of the slots i. e. when it is in the position shown in Figs. 1 or 2, the detent 8 is not moved when the segment 10 is rocked and consequently the stopping device is not operated.

When the apparatus is required to operate to repeat the playing of a record the pin 20 is out of the slots and the movements of segment 10 are utilized to operate a clutch device so that drive .of the machine motor is transmitted through a train of gearing to the repositioning mechanism for-the sound arm 13.

On the turntable spindle 26 driven in usual manner by the machine motor, not shown, or on the boss of the turntable is rigidly mounted a gear wheel 27 which engages with a second and larger gear wheel 28 mounted to rotate about an axis on the base plate and a gap 29 (Fig. 1) is provided in the teeth of gear wheel 28 which during playing of the machine rests opposite the teeth of rotating gear wheel 27, so that gear wheel 28 is not driven. On the same axis as and beneath gear wheel 28 is mounted a toothed segment 30'and this segment is adapted for-limited rotation with regard to gear-28 under the pull of a spring 31 connected between said segment and a pin 70 on wheel 28 intoa position against a stop 33 on wheel 28 where the teeth of the segment complete the teeth of gear wheel 28 so that the latter will be driven by wheel 27. During playing of the machine however, the segment 30 is held in the position shown in Fig. 1 against the pull of spring 31 by the engagement of a lug 34 on the segment 30 with the end of lever 17-.

When therefore lever 17 is rocked as described above, the segment 30 is released for movement under the pull of spring31 into the position where it completes gear wheel 28 so that the latter is driven by the gear wheel 27. When gear wheel 28 has made one complete revolution, the lug 34 again engages with the end of lever 17, the latter being pulled into the appropriate position by a spring 32, so that segment 30 is held stationary while gear wheel 28 moves 'on a short distance until its teeth are disengaged from those of wheel 27 through the gap 29, in which position a tooth on a spring catch 65 engages in a notch 66 on the cam 35 to-retain the latter in the position shown in Fig.1 until lever 17 is again rocked.

During rotation of wheel 28 a cam 71 engages the ,end of lever 17 to move it against spring 32,

so that segment 10 remains out of reach of pawl 11 'as'thelatter moves with the sound arm 13.

During one complete revolution of the gear wheel 28 the various steps necessary to reposition the sound arm 13 preparatory toreplaying the record on the turntable are carried out. The means for eifecting these steps will now be described. Upon the upper surface of wheel 28 is provided a cam 35 rotatable with said wheel 28 and with this cam engages a lever 36 pivoted at 36 to the base plate and a lever 37 pivoted at a point 38 which is movable with,

regard to the base plate.

The lever 36 which is rocked in one direction by the cam 35 and in the other direction by a spring clockwise direction from the position shown in Fig. 1 to that shown in Fig. 2.

The lifting means comprises an arm 42 (Fig. 5) mounted to rock vertically in bearings 43 on the rotatable portion of the sound arm, and extending beneath the neck of the sound box 16, and this arm 42 is raised to lift the sound box 16 by means of a pin 44 engaging beneath the arm 42 and movable vertically within a sleeve 45 carried by an arm 46 rigid with the movable portion of the sound arm. The lower end of pin 44 rests upon the inclined surface of are shaped member 41 and is raised as the latter moves with lever '36 into the position shown in Fig. 2 and in dotted lines in Fig. 5, whereupon the arm 42 and the sound b0x.16 are raised.

The lower end of pin 44 may also serve for the usual connection between the swinging sound arm 13 and the operating lever 12, said pin being capable of sliding vertically between the spring connected members 12 and 12'.

The swinging movement of the sound arm 13 4 outwards is effected by means of lever 37, which during rotation of the cam 35 is caused to rock about its pivot 38 in a clockwise direction and its free end engages the pin 44 to swing the sound armoutwards.

The extent of the outward throw of lever 3'7 may be varied in accordance with the size of the record to be played by moving the position of the pivot '38. I For this purpose said pivot is carried upon a link 47 connected with the adjusting lever 23 previously referred to, whereby said pivot is movable in a slot 48 formed in the base plate. Thus the extent of the outward movement of the sound arm is'determined by means of the same lever 23, which sets the apparatus for repetition or automatic stopping. In the case illustrated, the apparatus is shown as set-to repeat say 10" records in Fig. 1, to repeat 12" records in Fig. 2 and for automatic stopping in its length, which slot co-operates with a fixed guide pin 52 on the base plate to guide the lever 49 and hook50 as the pivot 38 is moved by lever 23, so that when the latter is operated to set the apparatus'to stop automatically, the hook 50 lies in the path of a lug 53 formed on the segment 30, so that said segment is held against movement, under the pull of spring 31 when lever 17 is rocked by lever 12 and pawl 11, into the position where the teeth of wheel 28 are completed. Thus the repetition mechanism cannot be set in operation. When lever 23 is reset for repetition hook 50 is moved from the path of lug 53.

Means are also provided to feed the reproducer gently inwards after the outward swinging movement has been efiected during repetition operation, to lead the stylusinto the commencing groove of the record. Such means comprises a link 54 pivotally connected at one end with a 58 on the lever'23, which lug extends-upwardly through a slot 59 of limited length formed in the plate 55. The other end of link 54 ,ca'rries a pin 60, one end of which slides in a slot 61 in the base plate, while the other end of the pin lies in the path of the end of the lever 12 and the arrangement is such that the link 54 and plate 55 aremoved slightly to stretch spring 56 when lever 12 reachesthe' limit of its swinging movement in conjunction with the sound arm 13 under the urge of lever 37 and contacts with pin 60.

The sound box 16 having been lowered, through the withdrawal of arc shaped member 41 from beneath post 44, to engage the stylus with thesmooth surface of the record outside the grooves,

the outward pressure of lever 3'7 upon post 45 ceases, the shape of the cam 35 permitting lever 37 to return first very slowly for a short distance and then freely, and during the first slowreturn movement of lever 37 the sound box 16 is fed gently inwards through sound arm 13, post 44-, lever 12, pin 60, link 54, plate 55 and spring 56. It will be understood that the initial position of plate 55 and link 54 is adjustedas lever 23 is moved, so that contact between lever 12 and pin 50 takes place at the appropriate time according to the size of the record to be repeated. The strength of the spring 56 is such that the stylus will not under any circumstances be caused to jump inwards past a groove.

I claim:v

1. A repeating device for talking machines comprising a pivoted .lever carrying at one end a curved track having a radially inclined surface,.a

post operatively connected with the reproducer and-positioned in the path of movement of said.

track, and means for swinging said lever. about its pivot, whereby the reproducer is raised during movement of the lever in one direction and lowered during movement of the lever in the other direction.

2. In a repeating device for talkingmachines,

in combination with means for raising and lowering the reproducer, means for swinging the reproducer outwardly to the point of commencement of the record comprising va lever'pivoted to move in a horizontal plane, means connected with the reproducer. and engaged by said lever to swing said reproducer, and means for so adjusting the pivotal point of the lever in said plane that the throw thereof and, consequently, the distance moved by the sound arm may be varied.

} 3. In a repeating device for talking machines, in combination with means for raising and lowering the reproducer, means for swinging the reproducer outwardly to the point of commence ment of the record comprising a lever pivoted to move in a horizontal plane, means connected with the reproducer and engaged by said lever to swing the reproducer, the point of pivotation of said lever being adjustable to permit the throw of said lever to be'varied, a control member, and means operatively connecting said control member and leverlfor adjusting the point of pivotation of said 0 lever.

4. A repeating device for talking machinescomprising a pair of levers pivoted to swing in horizontal. planes, one of said levers having an inclined surface,.means connected with the reproducer and engaged by said inclined surface to raise the reproducer. duringmovement of said producer during movementlof said one lever in the other direction, and means connected with thereproducer and engaged by said other lever to swing the reproducer outwardly to the point of commencement of the record. a

5. A repeating device for talking machines comprising a pair of levers pivoted to swing in. horizontal plarles, one of said levers having an inclined surface, means connected with the reraise the reproducer during .movement of said one lever in one direction and to lower the reproducer during movement of said one lever in adjusting the pivotal point of said other lever in said plane that the throw thereof and, consequently, the distance moved by the sound arm,

may be varied.

6. A repeating device for talking machines comprising a pair of levers pivoted to swing in horizontal planes, one of said levers having an inclined surface means connected with the reproducer and engaged by said inclined surface to raise the reproducer during movement of said one lever in one direction and to lowerthe reproducer during movement of said one lever in the other direction, means connected with the reproducer and engaged by said other lever to swing the reproducer outwardly to the point of commencement of the record, the point of pivotation of said other lever being adjustable to permit the throw of said lever to be varied, a control'member, and means operatively connecting said control memone. lever in one direction and to lower the reproducer and engaged by said inclined surface to her and said other lever to adjust the point of pivotation.

7. A repeating device for talking machines comprising a pair of levers pivoted to swing in horizontal planes, one of said levers having an inclined surface, means connected with the reproducer and engaged by said inclined surface to raise the reproducer during movement of said one lever in one direction and to lower the reproducer during movement of said one lever invthe other direction, said means connected with the reproducer being also engaged by said other lever to swing the reproducer outwardly to the point of commencement of the record, a cam for operating both of said levers, a machine motor, and means operative on completion of a record for drivingly engaging said cam with the machine motor.

. 8. In a repeating device for talking machines,

in combination with means for raising and lowering the reproducer, means for swinging the reproducer outwardly to the point of commencement of the record comprising a lever pivoted to move in a horizontal plane, means connected with the reproducer and engaged. by said lever to swing the reproducer, the point of pivotation of said lever being adjustable to permit the throw of said lever to be varied, a control member,

means operatively connecting said control member and lever for adjusting the point of pivotation of said lever, a member adapted to be moved when the sound arm reaches its outermost position over the edge of a record, said last named. member being resiliently urged against such movement, and -means connecting said last named member with said control member whereb'y'said reproducer ispositioned at the edge of records of different diameters.

9. A record repeating device for phonographs including a cam-actuated lever pivotally mounted for rotation in a horizontal plane, one end of said lever being provided with an integral cam surface inclined with respect to said plane, a

sound arm, a sound box carried by said sound arm, liftingmeans pivotally connected to said sound arm andextending beneath said sound box, and motion conveying means extending between said cam surface and" said lifting means' whereby, when said lever is rotated in one dicam surface and said arm whereby, when said lever is rotated in one direction, the reproducer is raised-and, when it is rotated in the'opposite direction, the reproducer is 16mm.

11. In combination with a phonograph including aturntable, a brake for said turntable, a sound arm and a reproducer [carried thereby, of a repeating device comprising a cam-actuated lever, means carried by said sound arm for raising and lowering said sound arm in responseto movement of said lever, a second cam-actuated .lever coacting .with said first named means for swinging sai'd sound arm' outwardly beyond the periphery of said turntable, and means coacting with said brake and said secondcam-actuated lever for maintaining said brake inoperative during successive operations of said repeating device.

' 12. In combination with a talking machine ineluding a sound arm and a reproducer carried thereby of a'repeating device comprising a 'camactuated lever pivotally 'mounted' for movement in a horizontal plane, one end of said lever having a' surface inclined with respect to said plane, a supporting arm pivotally connected to said sound arm and extending beneath said sound box,

means carried by said sound arm and operating between said inclined surface and said supporting' arm for raising and lowering said sound box upon movement'of said lever in each of two directions, a second cam-actuated lever pivotally mounted on an adjustable pivot pin and adapted for coaction with said second named means for swinging said sound arm outwardly to the point of commencement of a record, and manually controlled means connected to said pivot pin for set-- ting the same to vary the throw of said lever and the distance moved by said sound arm.

GEORGE FREDERICK CLARK. 

